The Portable SDK for UPnP Devices libupnp library contains multiple buffer overflow vulnerabilities. Devices that use libupnp may also accept UPnP queries over the WAN interface, therefore exposing the vulnerabilities to the internet.
Universal Plug and Play (UPnP) is a set of network protocols designed to support automatic discovery and service configuration. The Portable SDK for UPnP Devices (libupnp) is an open source project that has its roots in the Linux SDK for UPnP Devices and software from Intel (Intel Tools for UPnP Technologies and later Developer Tools for UPnP Technologies). Intel no longer maintains or supports these tools. Many different vendors produce UPnP-enabled devices that use libupnp.
As part of a large scale security research project, Rapid7 investigated internet-connected UPnP devices and found, among other security issues, multiple buffer overflow vulnerabilities in the libupnp implementation of the Simple Service Discovery Protocol (SSDP). Rapid7's report summarizes these vulnerabilities:
A remote, unauthenticated attacker may be able to execute arbitrary code on the device or cause a denial of service.
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We attempted to notify more than 200 vendors identified by Rapid7 as running libupnp. The following list includes vendors who responded to our notification and vendors for whom we had existing security contact information.
Thanks to HD Moore of Rapid7 for reporting this vulnerability, and Tod Beardsley for coordination support.